1345131431 has 4 divisors (see below), whose sum is σ = 1537293072. Its totient is φ = 1152969792.

The previous prime is 1345131427. The next prime is 1345131481. The reversal of 1345131431 is 1341315431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1345131431 - 2² = 1345131427 is a prime.

It is a super-2 number, since 2×1345131431² = 3618757133328215522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1345131431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345131401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96080810 + ... + 96080823.

It is an arithmetic number, because the mean of its divisors is an integer number (384323268).

Almost surely, 2^1345131431 is an apocalyptic number.

1345131431 is a deficient number, since it is larger than the sum of its proper divisors (192161641).

1345131431 is an equidigital number, since it uses as much as digits as its factorization.

1345131431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192161640.

The product of its digits is 2160, while the sum is 26.

The square root of 1345131431 is about 36676.0334687381. The cubic root of 1345131431 is about 1103.8792595214.

Adding to 1345131431 its reverse (1341315431), we get a palindrome (2686446862).

The spelling of 1345131431 in words is "one billion, three hundred forty-five million, one hundred thirty-one thousand, four hundred thirty-one".